Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2006-12-12
2006-12-12
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S1980DB, C123S19800E
Reexamination Certificate
active
07146966
ABSTRACT:
A cylinder cutoff control apparatus of an engine initiates a cylinder cutoff mode only when two conditions, namely a low load condition such as a vehicle cruising condition and an intake valve closure timing controlled to a given timing value before a bottom dead center, are both satisfied. A fuel cutoff mode is executed prior to the cylinder cutoff mode. During a transition to the cylinder cutoff mode, the control apparatus holds an intake valve open timing at a given timing value substantially corresponding to a top dead center, simultaneously with reducing an intake valve lift amount of each intake valve, subjected to cylinder cutoff control, to a zero lift. Immediately when the intake valve lift amount is reduced to below a lift threshold value, an exhaust valve lift amount of each exhaust valve, subjected to the cylinder cutoff control, is controlled to a zero lift.
REFERENCES:
patent: 5787855 (1998-08-01), Mueller et al.
patent: 6978204 (2005-12-01), Surnilla et al.
patent: 10-008935 (1998-01-01), None
patent: 10-082334 (1998-03-01), None
patent: 2003-172112 (2003-06-01), None
patent: 2004-156508 (2004-06-01), None
Gimie Mahmoud
Hitachi , Ltd.
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